ASRock Fatal1ty Z270 Boot Menu Graphic Glitch

skydiver88 wrote: Seems like the problem here must be M.2 SSDs as this is the common factor between us all. I'd like to pull the m.2 drive out and see how the boot menu behaves, but to be able to access the drive in the back of the motherboard the entire thing needs to be taken apart and I have liquid cooling installed, etc. Too much of a hassle

Or perhaps more specifically, the length of the text of each of the boot order entries, when using an M.2 SSD as the OS drive, in UEFI booting mode. For example, my boot order entry is:

Windows Boot Manager Samsung 960 EVO

I noticed in the Boot Manager feature screen, which allows you to enter the text for the boot device, it is limited in length. All I could enter was, "Windows Boot Man".

The best I could do now, as I've been running an Optane accelerated SATA SSD as the OS drive recently for testing purposes, is to put my original 960 EVO OS drive installation back into this PC, and check the results with the F11 screen. That only gives me two entries, but we'll see.

Has anyone with this issue tried a full UEFI/BIOS/NVRAM clear by removing the board's battery at the same time as moving the CLR CMOS jumper to the clear position. It seems the NVRAM became corrupted for some reason.

The battery must be left out for at least ten minutes, to allow any charge in the capacitors in the UEFI/BIOS chip power circuit to dissipate.

I believe in an early post in this thread, someone said that the time was not correct in the UEFI or OS. That is usually caused by a bad battery in the board, replacing it is worth doing, the battery is common and not expensive. The battery model is CR2032.

In the UEFI, in the Tools screen there should be an entry for the Boot Manager feature. That allows many more than six boot partition/drive entries. You should be able to edit the name of the drive, etc, for each entry. If the text entry for a drive/OS installation is formatted badly, that might indicate a compatibility issue between the tool and the partitioning or file system used on the drive or partition.

Disabling CSM requires the video source to be GOP compatible, a UEFI standard. Modern video cards should have a GOP compatible VBIOS, and the Intel iGPU has a GOP compatible VBIOS.

About the NVMe M.2 SSDs, with a Z270 board, if they are in the M.2 slots, they should be recognized in the System Browser tool, NVMe Configuration screen (in Advanced screen, view only), and in the Storage Configuration screen. If an M.2 NVMe is used in an M.2 to PCIe slot adapter card, then the M.2 SSD will NOT be shown in the Storage Configuration screen, and will only be shown in the System Browser tool.

An NVMe SSD should not need to be partitioned as MBR to be recognized in the UEFI or Boot Order. I use many different NVMe SSDs, all GPT partitioned, and they are recognized fine in my ASRock Z270 board. But I allow Windows to partition the SSD during the installation. If an NVMe SSD is MBR partitioned, then it is not fully UEFI booting. UEFI booting requires GPT partitioning.

I wonder about the use of Debian or Ubuntu with NMVe SSDs and these boards, what storage Option ROM in the UEFI will they use? What file systems are you using on the Debian or Ubuntu installations? I wonder if that is related to the poorly formatted text in the F11 boot menu entries?

Do you have the Fast Boot option set to anything besides disabled?

Ok, girls! I believe that I know what happened and why the bug isn't present at first time but suddenly appear after a time!
CSM isn't response for it but only COUNT OF MENU LINE! Why it fix when you disable CSM? Just notice that without CSM you haven't some disks in menu and it became shorter.
Just ass-hand programmers developed menu draw program with hope then it never never never will be more than 6 (or 7) elements. But they even didn't check that menu inder 6 elements and when menu grow more then they have something like overflow or writing in wrong area of memory.
Why it working first time? It is the second bug (second bug, Karl!). I noticed that when I install something a new line appearing on menu but when I delete it it isn't dissapear. So at first I have lines about ssd, 2xsata disks and 2xusb (simple usb and uefi usb). Then I installed Debian. And I got menu with Debian ssd, simple ssd, 2xsata and 2xusb. All was Ok. Then I decide erase Debian (because long support version can't support kaby lake inetl video) and install Ubuntu... I don't check how boot menu worked after it but when I want to reinstall my ubuntu... BUMM! - the bug. And you know what? I can see old Debian line - I can see it when I drew frozen menu with mouse moving (and the variant I can see in bios setting too).

I wrote about it to support lets see how fast they will be able to fix it!

skydiver88 wrote: I will sell this motherboard on ebay and buy something else. First and last ASRock purchase I ever make.

Road Runner wrote: Hello! I have ASRock H270M-itx mb, use onboard video, nvme ssd and a couple 6tb wd red in sata and have absolutely the same trouble (when f11 bios boot menu corrupted). I had a normal menu for a few days but suddenly trouble appear and I don't touch CSM option (but I'll try it when return to home today). I read the topic but don't understand was the trouble is decided? Or only can help CSM disabling/enabling? But if it is normal behavior when CSM enabled? May be it will be more simple return MB to the shop and if ASRock mbs became fly back to their then they became fix a problems? I cleared a CMOS, update BIOS up to 2/0 version but trouble still present. And now 2017 year. I googled and find very like trouble from 2015: https://techreport.com/forums/viewtopic.php?t=116125 Almost 2 years, Karl! But may be I don't understand at all. Please can you give me how to fix this trouble? With both CSM option - enabled and disabled?